Quasir, Naya Devastator

Flying, Riot, Double Strike, Convoke, Mentor
Alliance - Whenever another creature enters the battlefield under your control, choose one that
hasn't been chosen this turn:
• You gain 3 life
• Quasir deals 2 damage to target creature or planeswalker
• Put a +1/+1 counter on target creature or a
loyalty counter on target planeswalker